Machine tool



July 3, 1934.

w. D.'ARCHEA 1,965,210

MACHINE TOOL v Fild July 24,.1930 4 Sheets-Sheet 1 gwogmtw July 3, 1934.I R HEA 1,965,210

MACHINE TOOL Filed July 24, 1930 v 4 Sheets-Sheet 2 i] ell U 1 o v I r Tu W. D. ARCHEA MACHINE TOOL July-3, 1934.

Filed July 24,, 1930 4 Sheets-Sheet 3 July 3, 1934. v ARCHEA 1,965,210

MACHINE TOOL Filed July24 1930 4 Sheets-Sheet M4 75? Q Ame [A PatentedJuly 3, 19 34 p r I UNITED- STATES PATENT OFFICE v 1,965,210 momma'roor.

Walter-D. Archea, Non-wood, Ohio, assignor to The Cincinnati MillingMachine Company, Cincinnati, Ohio, a corporation of Ohio Application.iuly 24, 130, Serial No. 470,421 1 Claim. (Cl. 29- 70) This inventionrelates to milling machines and supporting the outboard end of a cutterarbor 15 more particularly to an improved cutting-01f maattached to thespindle 12 for rotation therewith. chine. a l 3 A work table 16 isslidably mounted upon the One of the objects of this invention is theprobase 10 and adapted to be reciprocated by-power vision of an improvedmachine for simultanemeans, indicated generally by the reference nuoously severing a plurality of pieces from each meral 17 which in thepresent instance comprises one of a plurality of bars of stock.hydraulic means.

A further object of this invention is the pro- The present machine isadapted to mill or cut vision, in a machine having a reciprocating worksimultaneously a plurality of pieces of bar stock,

table, of an auxiliary support movable with the such as 18, into shortpieces of a length deter- 65 table to act as a conveyor for feeding workinto mined by the spacing of the cutters on the cutthe machine. terarbor 151 Since the ends of the stock are An additional object of thisinvention is the apt to be rough a milling cutter 19 is providedprovision of a cutting-off machine for bar stock on the arbor forsquaring upv the ends of the 5 having means for squaring the ends of thestock stock while the. spaced cutters 20, 21, 22 and 23 7 and additionalmeans for severing a plurality of are simultaneously operating uponthebar to Pieces Of VariOuS lengths refrom in a single sever a plurality ofpieces therefrom. After the operation. stock has been squared up and theinitial group Other objects and advantages of the present of pieces cutoff the work is moved into the mainvention should b r a pp r nt y r fernce chine for the severance therefrom of another 75 to the followingspecification considered in congroup of pieces. This time the end of thework junction with the accompanying drawings illusabuts a stop which isin the plane of the cutter trative of one embodiment thereof but it willbe 19 thereby preventing operation of this cutter as understood that a ymodification may be made the cutter 23 in cutting off the last pieceduring 5 in the specific structural details hereinafter disthe previousoperation thereby automatically closedwithin the scope of the appendedclaim left thegnd, of the stock square,

Witho p in from or exceeding the Spirit Since the operation of thismachine is to be of the invention. continuous, provision has been madefor two Referring to the drawings in which like refer-. groups of workpieces whereby during the oper- I ence numerals indicate like parts:ation of the cutters upon one group, the severed 85 Figure 1 is anelevation of a machine emb dypieces of thesecond group may be removedand ing the principles of this invention. the work fed into the machinein preparation Figure 2 i5 Section taken on h line of for a succeedingoperation. A pair of work hold- Figure 1. ers have, therefore, beenprovided which are in- Figure 3 is a Section taken on the line ofdicated generally by the reference numerals 24 o Figure 1. and 25 inFigure '7. Since each work holder is flgg l 1 a Sectlon as awed on theline 4-4 the same a description of one is thought to be 0 iguresuflicient. The work holder 25 is provided with from the left in Figure1 a fixed jaw 26 and a plurality of movable jaws Figured is a plan viewof one of the work hold- 30 and as Shown m Figure Each 1 of the jaws aremounted upon a pivot pin 32 fiz ig ggfi gg gf the clamping e e which isthreaded into the casting of the work holder at an angle thereto and hasa heavy Figure '1 1s a detail section through a pair of 45 work holdersshowing the work clamping mechsplmg 1119111118133 mounted he eon andmter- Figure 5 is a side view of the machine as viewed anism posedbetween the movable jaw and-the casting Figdre 8 is a detail the stopmechanism of the work holder. Each movable jaw, as for Figure 9 is adetail f an equalizer c]amp instance, 31 has a large bore 34 forreceiving the Figure 10 is a modified form of a work holder. member 32,which is slightly smaller thanthe .50 In the drawings the referencenumeral 10 inbore to permit t member 31 t0 Pivot Slightly dicates thebase of the machine having adjacent about the pin- Ali adjusting nut 35and a lockthereto an upright portion or column 11 which ing nut 36 arethreaded on the end of the memsupports a cutter spindle 12. An overarm13 is her 32 and serve as a fulcrum for the member also carried by thecolumn and has a depending 31. An automatic adjusting face plate 3'7 isat- 55 support 14 attached ,to the free end thereof for tached to theend of each jaw and is adapted to vmovable operating handle.

adjust itself to the plane of the work upon clamping the same.

Since the numerous work pieces as they are severedfrom the bar stockwould become loose and apt to bind against the cutters upon theirwithdrawal, means have been provided to insure clamping of each sectionof the bar between each pair of cutters before cutting in order toprevent damage or breakage of the cutters. To insure that each clampfirmly grips its particular section, the clamps have been divided upinto two groups, one group represented by the jaws 27 and 28, and theother group, the three remaining jaws, 29 to 31' inclusive. The jaws 27and 28 are actuated by an equalizer member 38, shown more particularlyin Figure 9, which is engaged midway of its'length by the member 39.This member is reciprocated by the action of a cam 40 mounted on theshaft il engaging the roller 42 journaled in the end of the member 39.Rotation of the shaft 41 is effected by a lever, such as 43, keyedthereto and pivotally connected at its opposite end to' the member 44which has a threaded end engaging the threaded socket 45 in the end ofthe shaft 46 journaled in the member 25'but held against longitudinalmovement with respect thereto. A handle 47 is fixed to the end of theshaft 46 for effecting rotation thereof, movement of which in onedirection will efiect clamping of the jaws 27 and 28 and movement in theother direction will effect unclamping aided-by the spring'member 33.

The jaws 29 and 30 are operated in a similar manner as that justdescribed for the jaws 27 and 28 but by}; separate cam shaft 48.

The actuation'ofthe jaw 31 is effected by a separate plunger 49 having ahardened head 50 which engages a spring pressed plunger 51 mounted inthe lower end of the member 31. The spring 52,, which is interposedbetween the head of the plunger 51 and the jaw 31, acts as an equalizingmember to insureclamping of the jaw 31 independent of the clamping ofthe members 29 and 30.

Individual work'supports 24' and 25' having stock carriers are providedfor supplying each work holder with-stock and both are secured to thework table for movement therewith. The outboard ends of the worksupports are connected together bythe member 53, as. shown in Figures 1and 5, which also serves as a guide ,7 rail, it being supported byspaced stanchions 54 and 55 arranged'in a line parallel. to'jthe,direction of movement of the table havingjirollers 56 journaled in theupper 'end of each.'--E'ach work support is attachedto the work table bymeans shown more particularly in Figure 2.; ;,The end of each worksupport is provided with a vertical flange 57 by which it is bolted tothe side of the work holder by bolts 58 and secured to a bracket 59 bybolts 60.- Each work support is also provided with a stock carrier 61which is slidably mounted upon the frame 62 and adapted to be movedtherealong by means of a rack 63 formed in the under side of thecarrier, which is engaged by a pinion 64 keyed to the stub shaft 65journaled in the frame 62. The shaft 65 has a squared end 66 which maybe engaged bya reclamping screw 69 having the handle 70 attached Sincethe carrier 61.

to the end thereof. Since the bar stock used is comparatively heavy,rollers have been provided, at spaced intervals, such as 71 shown inFigure 3, mounted upon the stub shafts 72 journaled in the sides 73 ofthe work support.

The operation of the carrier is as follows:

Referring to Figure 1, the carrier is shown in its extreme position tothe right and after the stock has been clamped in the'work holder 25 theclamping screw 70 is released and the carrier moved to an extreme leftposition by the rotation of shaft 65 causing pinion 64 to reciprocatethe carrier through its rack 63. The carrier in this case moves relativeto the stock since the stock is being held by the work holder. Thispermits the carrier to obtain anew grip on the work as by tightening thelocking screw 69 after which the pinion 64 is rotated in a reversedirection to effect movement of the work into the machine. In order tocentralize the operating levers of the machine both of the work supportsare arranged to be operated from a single position and as shown inFigure 1, a second operating shaft 74 is arranged adjacent to the shaft65 for reciprocating thecarrier in the remote support.

In order to properly position the work with respect to the cutters astop has been provided, shown more particularly in Figure 8. A slidingstop member 75 is reciprocably mounted in the end of the work holderbracket and has its inner face in the same plane as the cutting face ofthe milling cutter 19. A bell crank 76 is pivotally mounted in the endof the work holder and has a rounded head on one arm engaging a slot 80in the stop 75 so that upon rotation of the bell crank by means of theconnecting rod 77 operated by the handle 78, the stop will be moved upor down. A spring 81 attached to a fixed part of the machine engages apin 82 fixed to the connecting rod and tends to hold the stop in araised position. Since the stop 75 is in the same plane 79 upontheface'of thespindle carrier having cam faces 83 and 84 whicfi'are adaptedto engage a pin 85- projecting fronttheoutside face of the lever arm 86of the belllcra'nk] 1 76. Itshould be apparent by reference to Figure 8that when the pin-85 engages the face 83 the stop r'n'ember 75 will bemoved downward and the surface 87 will hold the stop down' until it haspassed the cutter.

While one group of work pieces is being operated upon the parts whichhave been severed from the other group are removed from the machine bylowering the stop 75 and feeding the bars 18 inward. This feedingmovement causes the severed pieces to drop into the chute 88 from whichthey slide by gravity, into the container 89. It is understood that aseparate chute and container are provided for each work holder.

A modified form of work holder is shown in Figure 10 in which theclamping jaws are pneumatically operated. In this case the lever, suchas 43, is connected to the end of a piston rod 90 attached to a piston91 reciprocably mounted in a cylinder 92. A pair of such cylinders aremounted side by side for operating the clamping jaws of one work holderwhile another pair ting element carried by the support, a powerreciprocable table carried by the supportfor movement transversely ofthe cutting element, said table being adjacent the front wall of saidsupport, work supports projecting laterally from the table beyond saidfront wall and on opposite sides of the cutting element, means tosupport the outboard end of the work support .in the plane of the table,said work supports being power actuable with the table laterally of thecutting elements to alternately present the stock in the respective worksupports to the cutting. element, and means to feed the bar stock in onework support transversely of the table during operation of the cuttingelement' on the stock in the other work support.

WALTER D. ARCHEA.

